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Hi all,

New to the forum and the hobby for that matter. Big thanks to all the contributors here, I've used this forum extensively to guide me through initial purchases and setup.

That being said, I'm setting up my first planted aquarium. My current setup:
21 gallon tall aquarium
Eheim 2217 filter (got it 3 months used for $30, I know it's a bit over kill but it was a good deal)
pressurized co2 through an ADA diffuser
75 watt heater
Eco-Complete black substrate
Seachem flourish/potassium/phosphate/nitrogen/tabs for ferts

My stocking plans (which have not yet begun):
Fish:
1 betta (have this guy from a small fish bowl I've kept for a while, can't leave him behind)
6 tiger barbs
1 blue dward gourami
6 zebra or leopard Danio's
1 Angelfish
5-10 red cherry shrimp or ghost shrimp... haven't quite decided yet

Plants:
Monte Carlo to carpet the floor
Java moss to try and get going on the rocks

I'm going to try and plant the tank this week and let it get through its cycle. After that, I'll start adding fish a few at a time.

My main concern is overstocking. The tank will be very well filtered and I'm planning on 30% weekly water changes. Am I pushing it with these fish/quantity mentioned here? Should I just carefully watch the tank parms as I gradually stock and discontinue adding the fish above if readings start to look not so healthy?

Thanks,
-coomie
 

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I'd consider dropping the gourami and definitely the angel, at least. The tank is frankly too small for an angel. As they get bigger, and longer fins they'll want ample swimming space and in my opinion, 21 gallons just won't do it, especially with all the other fish. In my early fish-keeping I had an angel in a 20 gallon column tank and he turned super aggressive once he was fully grown I think mostly because he was crowded. Not to mention they can be aggressive in general, tight spaces or not. So to me, the angel is a no go. The gourami is hit or miss, the problem there may also be aggression either on the side of the betta to the gourami or vice versa. Both fish are mid-upper level dwellers so they could be in each other's way. I've also heard stories of barbs nibbling on betta fins. Since bettas are very slow swimmers, they're easy pickings for fast, hungry scavenger fish like tiger barbs. Not sure if the danios are the same. Tetra are good options as they're very docile and come in all sorts of colors (rummy nose, penguin, neon, cardinal, etc). I think consider one, slightly larger school of fish (maybe 6-10 depending on size) instead of two small schools. The final bit of advice I would give you is, assuming the betta is the most aggressive fish with the others being shoaling fish, add him last. If he's in the tank first, he'll think the whole territory is his and then when you add new fish, he'll chase and attack them cause they're invaders. But if they're in it first for a few days to settle in, once the betta is added he'll know that the space is shared and likely not be aggressive towards the first inhabitants. Shrimp would be excluded from this rule, though keep in mind the betta may eat a few baby shrimp here and there, which isn't really an issue with prolific breeders like cherries. Anyway, hope all that is useful.

As far as plants, that sounds good. You may need to dose Fe as well.

Welcome and best of luck with this setup!
 

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Thank you Ethan,

That is some great advice. Yeah, it was really the Angel that I figured would be pushing it. I also like the idea of having 10 or so tigers instead of a small school of tigers and danios. Also, good thinking with the betta, very curious to see how he interacts with new "friends". Hopefully with enough tigers, they won't be tempted to bother the betta, I'll keep my betta tank just in case.

Thanks again,
-Coomie

Starting to lean towards something besides tigers... seeing lots of people having aggression issues with them, especially in a 20 gallon.
 

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Gourami and betta together is also a no go...
Actually none of the stuff you posted together would work out.

Shrimp would get eaten by everything, danios eaten by angels

I'd rather stick to the barbs, maybe get a few colour variants of the same...

 
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